freestompboxes.org

Posted: **04 Jul 2008, 17:03**

http://www5b.biglobe.ne.jp/~houshu/synth/Ph44core.gif

Does enyone have something more on this???
please

Posted: **15 Nov 2008, 20:19**

I have one now open and tracing........ man, big pedal with a lot of connections

Posted: **16 Nov 2008, 02:05**

I've only got the schematic for the PH-03, sorry.

Posted: **16 Nov 2008, 11:27**

I have one now open and tracing.....

some guts ??? ...................thanks

Posted: **16 Nov 2008, 15:59**

There's one on eBay right now (couple of hours left though! @ £49 atm)
http://cgi.ebay.co.uk/RARE-80s-Pearl-Ph ... dZViewItem

Just thought I'd post it!

Posted: **17 Nov 2008, 13:36**

Schematic (put in parts as it is a HUGE one

)

PSU
Audio path
Phase stages
Parameters
Switching

The huge thing on the right on the parameters schematic is a MC14007 IC with the pinnumbers..... didn't have on in my software. Everything in this unit is fed with the V+2 (12V) but the LEDs are fed with V+1 (18V). Speed ramps up and down when the speed button is pressed.

Part marked "switch" in "Switching" schematic connects to "Sw" in "Audio path" schematic

Posted: **17 Nov 2008, 14:22**

Awesome, thank you!

Posted: **17 Nov 2008, 15:56**

thanks...... it is big!!!

Posted: **17 Nov 2008, 20:29**

Thanks.

Posted: **18 Nov 2008, 18:02**

Bernard,
Excellent work! Those buggers are bitches to trace.

Posted: **20 Feb 2010, 22:53**

can somebody please repost those images and schemes???

thanks

boris

Posted: **21 Feb 2010, 14:50**

I'll upload em

Check

Posted: **21 Feb 2010, 18:38**

Bernardduur wrote:I'll upload em

Check

Excellent!

Now that's a different way of doing a phase stage! If you select the transistors (or use an array on an IC), you can eliminate differences between stages. I'm going to have a play with that way of doing things. Thanks for posting your tracing!

Posted: **21 Feb 2010, 20:46**

Bernardduur wrote:I'll upload em

Check

borislav

Posted: **10 Oct 2015, 12:26**

Bernardduur wrote:I'll upload em
Check

I know it has been a long time...
But can someone upload again the original, and hopefully higher resolution than currently on PhotoBucket, schematic picts of this PH44?
I'm having trouble reading the components.
Thanks!